From d- to p-wave pairing in the t-t' Hubbard model at zero temperature

Abstract

We develop a DCA(PQMC) algorithm which employs the projective quantum Monte Carlo (PQMC) method for solving the equations of the dynamical cluster approximation (DCA) at zero temperature, and apply it for studying pair susceptibilities of the two-dimensional Hubbard-model with next-nearest neighbor hopping. In particular, we identify which pairing symmetry is dominant in the U-n parameter space (U: repulsive Coulomb interaction; n: electron density). We find that p_{x+y}- (d_{x^2-y^2}-) wave is dominant among triplet (singlet) pairings -at least for 0.3<n<0.8 and U<=4t. The crossover between d_{x^2-y^2}-wave and p_{x+y}-wave occurs around n~0.4.

5 pages 5 figures; two additional panels in Fig. 2; as to appear in Phys. Rev. B

References in corpus (9)

• Quantum Cluster Theories
• Systematic study of d-wave superconductivity in the 2D repulsive Hubbard model
• Renormalization group analysis of magnetic and superconducting instabilities near van Hove band fillings
• Orbital-selective Mott-Hubbard transition in the two-band Hubbard model
• Interaction flow method for many-fermion systems
• Off-site-repulsion induced Triplet Superconductivity: a possibility of chiral p${}_{x+y}$ pairing in Sr${}_2$RuO${}_4$
• Projective Quantum Monte Carlo Method for the Anderson Impurity Model and its Application to Dynamical Mean Field Theory
• Quantum Monte Carlo study of the pairing symmetry competition in the Hubbard model
• U-J Synergy Effect for the High Tc Superconductors

Cited by in corpus (4)

• Doped Mott insulator as the origin of heavy Fermion behavior in LiV2O4
• Superconducting Fluctuations in the Normal State of the Two-Dimensional Hubbard Model
• Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model
• Reply to a Comment on ``Projective Quantum Monte Carlo Method for the Anderson Impurity Model and its Application to Dynamical Mean Field Theory''